Plum Upside Down Cake Recipe for All Occasions

Ingredients

• ½ cup sugar (for plums)
• ¼ cup water (for plums)
• 1½ tablespoons unsalted butter, at room temperature (for plums)
• 6–8 plums, pitted and sliced ½”-thick
• ½ cup sour cream (for cake)
• 2 tablespoons low fat milk (for cake)
• 2 teaspoons vanilla extract (for cake)
• 1/3 cups sugar (for cake)
• 1½ cups all-purpose flour or gluten-free flour (for cake)
• 1 teaspoon baking powder (for cake)
• ½ teaspoon baking soda (for cake)
• Pinch of Kosher salt (for plums)
• ¼ teaspoon Kosher salt (for cake)
• 1½ sticks unsalted butter, at room temperature (for cake)
• 2 large eggs (for cake)